
/* @(#)w_remainder.c 5.1 93/09/24 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunPro, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

/*
FUNCTION
<<remainder>>, <<remainderf>>---round and  remainder
INDEX
    remainder
INDEX
    remainderf

ANSI_SYNOPSIS
    #include <math.h>
    double remainder(double <[x]>, double <[y]>);
    float remainderf(float <[x]>, float <[y]>);

TRAD_SYNOPSIS
    #include <math.h>
    double remainder(<[x]>,<[y]>)
    double <[x]>, <[y]>;
    float remainderf(<[x]>,<[y]>)
    float <[x]>, <[y]>;

DESCRIPTION
<<remainder>> and <<remainderf>> find the remainder of
<[x]>/<[y]>; this value is in the range -<[y]>/2 .. +<[y]>/2.

RETURNS
<<remainder>> returns the integer result as a double.

PORTABILITY
<<remainder>> is a System V release 4.
<<remainderf>> is an extension.

*/

/*
 * wrapper remainder(x,p)
 */

#include "fdlibm.h"
#include <errno.h>

#ifndef _DOUBLE_IS_32BITS

#ifdef __STDC__
    double remainder(double x, double y)    /* wrapper remainder */
#else
    double remainder(x,y)           /* wrapper remainder */
    double x,y;
#endif
{
#ifdef _IEEE_LIBM
    return __ieee754_remainder(x,y);
#else
    double z;
    struct exception exc;
    z = __ieee754_remainder(x,y);
    if(_LIB_VERSION == _IEEE_ || isnan(y)) return z;
    if(y==0.0) {
            /* remainder(x,0) */
            exc.type = DOMAIN;
            exc.name = "remainder";
        exc.err = 0;
        exc.arg1 = x;
        exc.arg2 = y;
            exc.retval = 0.0/0.0;
            if (_LIB_VERSION == _POSIX_)
               Djy_SaveLastError(EDOM);
            else if (!matherr(&exc)) {
               Djy_SaveLastError(EDOM);
            }
        if (exc.err != 0)
           Djy_SaveLastError(exc.err);
            return exc.retval;
    } else
        return z;
#endif
}

#endif /* defined(_DOUBLE_IS_32BITS) */

















